> Could you tell me where the related code is in mantisbt?
> I got its official git repository and didn't find that.
>

It's not yet in the standard codebase, and is being developped in our
SVN repo. But the plan is to try and have it adopted by MantisBT.
We want to bring it closer to 1.0 (0.7 at the moment), i.e. to complying
with most important features of OSLC-CM V1 before contributing it
officially to MantisBT.
More details at :
https://picoforge.int-evry.fr/cgi-bin/twiki/view/Oslc/Web/MantisOslcServer
Note that we're currently refactoring the Zend framework code to merge
the two implementations for Mantis and FusionForge.

> OSLC-CM [0] is a proposed standard for interfaces with bugtrackers.
>
> It would be great if SD could operate to sync with OSLC-CM compatible
> trackers.
>
> Note that among such trackers will be Mantis once [1] is completed, and
> FusionForge trackers [2], to only mention open source trackers for which
> I know OSLC-CM implementations plans are currently ongoing.
>

More details on OSLC-CM compatible trackers : the FusionForge one is
more mature now that the MantisBT's, and there exist a wrapper for
Bugzilla (Cf. Eclipse Lyo project), that can be used too.
My 2 cents,